<?php
class Util {
	
	public static function removeAccents($string){
		if ( !preg_match('/[\x80-\xff]/', $string) )
			return $string;
		
		if (self::seems_utf8($string)) {
			$chars = array(
					// Decompositions for Latin-1 Supplement
					chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
					chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
					chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
					chr(195).chr(135) => 'C', chr(195).chr(136) => 'E',
					chr(195).chr(137) => 'E', chr(195).chr(138) => 'E',
					chr(195).chr(139) => 'E', chr(195).chr(140) => 'I',
					chr(195).chr(141) => 'I', chr(195).chr(142) => 'I',
					chr(195).chr(143) => 'I', chr(195).chr(145) => 'N',
					chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
					chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
					chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
					chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
					chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
					chr(195).chr(159) => 's', chr(195).chr(160) => 'a',
					chr(195).chr(161) => 'a', chr(195).chr(162) => 'a',
					chr(195).chr(163) => 'a', chr(195).chr(164) => 'a',
					chr(195).chr(165) => 'a', chr(195).chr(167) => 'c',
					chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
					chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
					chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
					chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
					chr(195).chr(177) => 'n', chr(195).chr(178) => 'o',
					chr(195).chr(179) => 'o', chr(195).chr(180) => 'o',
					chr(195).chr(181) => 'o', chr(195).chr(182) => 'o',
					chr(195).chr(182) => 'o', chr(195).chr(185) => 'u',
					chr(195).chr(186) => 'u', chr(195).chr(187) => 'u',
					chr(195).chr(188) => 'u', chr(195).chr(189) => 'y',
					chr(195).chr(191) => 'y',
					// Decompositions for Latin Extended-A
					chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
					chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
					chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
					chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
					chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
					chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
					chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
					chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
					chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
					chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
					chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
					chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
					chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
					chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
					chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
					chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
					chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
					chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
					chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
					chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
					chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
					chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
					chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
					chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
					chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
					chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
					chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
					chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
					chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
					chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
					chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
					chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
					chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
					chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
					chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
					chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
					chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
					chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
					chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
					chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
					chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
					chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
					chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
					chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
					chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
					chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
					chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
					chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
					chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
					chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
					chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
					chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
					chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
					chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
					chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
					chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
					chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
					chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
					chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
					chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
					chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
					chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
					chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
					chr(197).chr(190) => 'z', chr(197).chr(191) => 's',
					// Euro Sign
					chr(226).chr(130).chr(172) => 'E',
					// GBP (Pound) Sign
					chr(194).chr(163) => '');
		
			$string = strtr($string, $chars);
		} else {
			// Assume ISO-8859-1 if not UTF-8
			$chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
			.chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
			.chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
			.chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
			.chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
			.chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
			.chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
			.chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
			.chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
			.chr(252).chr(253).chr(255);
		
			$chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";
		
			$string = strtr($string, $chars['in'], $chars['out']);
			$double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
			$double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
			$string = str_replace($double_chars['in'], $double_chars['out'], $string);
		}
		
		return $string;
	}
	
	private static function seems_utf8($str)
	{
		$length = strlen($str);
		for ($i=0; $i < $length; $i++) {
			$c = ord($str[$i]);
			if ($c < 0x80) $n = 0; # 0bbbbbbb
			elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb
			elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb
			elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb
			elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb
			elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b
			else return false; # Does not match any model
			for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
				if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))
				return false;
			}
		}
		return true;
	}

    public static function stripTagsAndCount($str){
        return strlen(htmlspecialchars(strip_tags(str_replace("&#65279;", "",$str))));
    }
	
	public static function sanitizeString($str, $allowTag=""){			
// 		$str = utf8_decode($str);
		
		if ($allowTag != ""){
			$str = strip_tags($str, $allowTag);
		} else {
			$str = strip_tags($str);
		}
		
		$str = html_entity_decode($str);
		$str = trim($str);
		return stripslashes($str);
	}

    /**
     * @param $str
     * @param bool $allowTags - defaults to false
     * @return string
     */
    public static function purifyString($str, $allowTags=false){
        $purifier = new CHtmlPurifier();

        $options = array(
            'Attr.AllowedFrameTargets'=> array('_blank','_self','_parent','_top'),
            'HTML.Allowed' => 'p,a[href|target],b,i,br,span,div,hr,h1,h2,h3,h4,h5,h6,ul,li,ol'
        );

        $purifier->actions($options);
        $str = $purifier->purify($str);
        if (!$allowTags){
            $str = strip_tags($str);
        }

        return $str;
    }
	
	/**
	 * Recibe el post de un form y sanitiza todos los campos por default.
	 * Si solo queres algunos campos, lo tenes que especificar en el segundo parametro por array
	 * @param array $formPost
	 * @param array $fields
	 */
	public static function sanitizeFormFields($formPost, $fields=null, $allowTags=""){
		foreach ($formPost as $field => $value){
			
			if (!is_null($fields)){
				if (in_array($field, $fields)){
					$formPost[$field] = self::sanitizeString($value, $allowTags);
				} else {
					$formPost[$field] = $value;
				}
				
			} else {				
				$formPost[$field] = self::sanitizeString($value, $allowTags);
			}
		}
		return $formPost;
	}

	public static function deleteFile($path){
		@unlink($path);
	}
	
	
	public static function methodStarts(){		
		$mtime = microtime(); 
		$mtime = explode(" ",$mtime); 
		$mtime = $mtime[1] + $mtime[0]; 
		$starttime = $mtime; 
		return $starttime; 		
	}	
	
	public static function methodEnds($starttime){
		$mtime = microtime(); 
		$mtime = explode(" ",$mtime); 
		$mtime = $mtime[1] + $mtime[0]; 
		$endtime = $mtime; 
		$totaltime = ($endtime - $starttime); 
		echo "This page was created in ".$totaltime." seconds";
	}
	
	/**
	 * genera un slug separado por guiones medios a partir del string que le pases.
	 * Saca caracteres especiales y los reemplaza por los mas cercanos.
	 * Ejemplo: ñ = n
	 * @param string $str
	 */
	public static function generateSlug($str, $unique=false){
		$str = str_replace("á","a", $str);
		$str = str_replace("é","e", $str);
		$str = str_replace("í","i", $str);
		$str = str_replace("ó","o", $str);
		$str = str_replace("ú","u", $str);
		$str = str_replace("ñ","n", $str);
		$str = str_replace("ö","o", $str);
		$str = str_replace("ë","e", $str);
		$str = str_replace(".","-", $str);
		$str = iconv('UTF-8', 'ASCII//TRANSLIT', $str);
		$str = preg_replace("/[^a-zA-Z0-9\/_| -]/", '', $str);
		$str = strtolower(trim($str, '-'));
		$str = preg_replace("/[\/_| -]+/", '-', $str);
	
		if ($unique){
			return $str."-".time();
		}
		return $str;
	}
	
	public static function escapeQuote($str){
		return str_replace("'","\'", $str);
	}
	
	public static function generateRandomUsername(){
		$letras = "xyzdefjklghituvwmnopqrsabc";
		$start = rand(0,22);
		$length = 4;
		return "usuario".time().substr($letras, $start, $length );		
	}

    /**
     * @param $imageTempName
     * @return array
     */
    public static function getImageDimensions($imageTempName){
		$arrImageInfo = getimagesize($imageTempName);
		 
		list($width, $height, $type, $attr) = $arrImageInfo;
		return array(
				"width" => $width,
				"height" => $height,
		);
	}

    /**
     * paso un string y lo dejo formateado para que pueda ser utilizado en una url como parametro GET
     * @param $string
     */
    public static function prepareStringAsGetParam($string){
        $string = str_replace("&", "%26", $string);
        return $string;
    }

    public static function generateNewToken($str){
        return md5($str).time();
    }

    public static function checkNumberFormat($fieldName, $number){
        $allowedChars = "0123456789,* -";

        for ($i=0; $i < strlen($number); $i++){
            if (strpos($allowedChars, $number[$i]) === false){
                return array(
                    "status" => "err",
                    "msg" => ucfirst($fieldName)." no tiene un formato correcto."
                );
            }
        }

        return array("status" => "ok");
    }

    /**
     * @param string $imageName
     * @param string $originFolder - Desde root folder sin "/" ni al principio ni al final Ej: uploads/origin_folder
     * @param string $destinationFolder - Desde root folder sin "/" ni al principio ni al final Ej: uploads/dest_folder
     * @param integer $width
     * @param integer $height
     * @param bool $uniqueImageName
     * @param null $quality - 0 a 100
     */
    public static function resizeImageAndSave($imageName, $originFolder, $destinationFolder, $width, $height, $uniqueImageName=true, $quality=null){
        $quality = (is_null($quality) || !is_numeric($quality)) ? 100 : $quality;
        $destinationFolder = Yii::getPathOfAlias('webroot')."/".$destinationFolder."/";

        $newImageName = $imageName;
        if ($uniqueImageName){
            $nameExt = self::getFilenameAndExtension($newImageName);
            $newImageName = $nameExt["filename"]."_".rand(0,1000).".".$nameExt["extension"];
        }

        //carga la imagen previamente subida
        $image = Yii::app()->image->load($originFolder."/".$imageName);
        $image->resize( $width, $height)->quality( $quality ); // or $image->resize(120, 120)->rotate(-45)->quality(75)->sharpen(20);
        $image->save($destinationFolder.$newImageName); // or $image->save('images/small.jpg');
    }

    public static function getFilenameAndExtension($strFullName){
        $arr = array(
            "filename" => pathinfo($strFullName, PATHINFO_FILENAME ),
            "extension" => pathinfo($strFullName, PATHINFO_EXTENSION )
        );
        return $arr;
    }

    /**
     * Recibe un array con los tags que hay que sacar y devuelve el string limpio
     * @param $tags array
     * @param $string
     * @return string
     */
    public static function stripSpecificTags($tags, $string){
        foreach( $tags as $tag ){
            $string = preg_replace('#</?'.$tag.'[^>]*>#is', '', $string);
        }
        return $string;
    }

    public static function writeJsonToFile($fullPath, $array, $FLAG=null){
        if (file_put_contents($fullPath, json_encode($array),  (is_null($FLAG)) ? 0: $FLAG  ) === false){
            return false;
        }
        return true;
    }

    /**
     * Este metodo es un workaround porque parece que Yii tiene un bug a la hora de mostrar el error
     * de exceso de
     */
//    public static function readableFileSizeError($strModelError){
//        //WORKAROUND PARA EL MENSAJE DE ERROR CUANDO LA IMAGEN ES MAS GRANDE QUE 1MB
//        //AL PARECER YII TIENE UN BUG CUANDO SETEAR EL CUSTOM ERROR MESSAGE PARA FILES Y EL ERROR POR DEFAULT MUESTRA EL PESO MAXIMO EN BYTES EN VEZ DE MB.
//        if (!empty($strModelError)){
//            //$msj = str_replace("1048576 bytes", "1MB", $msj);
//            $msj = str_replace("524288 bytes", "512kb", $strModelError);
//            $model->clearErrors("imagen");
//            $model->addError("imagen", $msj);
//
//        }
//    }
}
